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NAVIGATIONAL WARNING TO ALL CONCERNED: 
REF (A) GREEK NOTAM A1851/26 (041036 EUCYYIN JUN 2026). 
REF (B) TURKISH NOTAM A2420/26 (041240 EUCYYIN JUN 2026). 
REF (C) TURKISH NOTAM A2306/26 (020749 EUCYYIN JUN 2026). 
REFERENCE IS MADE TO THE ABOVE REF (B) TURKISH NOTAM A2420/26 (041240 
EUCYYIN JUN 2026) IN ORDER TO STATE THAT THE ATHINAI/ISTANBUL FIR 
BOUNDARY BETWEEN POINTS 405000N0261000E AND 365000N030000E HAS BEEN 
ESTABLISHED BY ICAO REGIONAL AGREEMENTS WITH THE PARTICIPATION AND 
APPROVAL OF TURKIYE AND CONSEQUENTLY IS FOUNDED ON THE FIRMEST 
POSSIBLE LEGAL BASIS AS NOTED IN OUR A1709/07 LGGGYNYX NOTAM. 
MORE SPECIFICALLY, THE REGIONAL AIR NAVIGATION AGREEMENT REACHED IN 
THE SECOND MIDDLE EAST REGIONAL AIR NAVIGATION MEETING (ISTANBUL 
1950) AGREED THAT THE ATHINAI/ISTANBUL FIR BOUNDARY BETWEEN POINTS 
405000N0261000E AND 365000N030000E FOLLOWS THE WESTERN FRONTIER OF 
TURKIYE. THIS AGREEMENT WAS SUBSEQUENTLY APPROVED BY THE ICAO COUNCIL 
ON 14 DEC 1950 (DOC 7055 MID/2 RAC) AND IN FEB 1958 (DOC 7879, 
EUR/1). 
FURTHERMORE, THE SAID ATHINAI/ISTANBUL FIR BOUNDARY WAS DEPICTED ON 
CHART NUMBER 7 ATTACHED TO THE REGIONAL AIR NAVIGATION AGREEMENT 
WHICH WAS REACHED IN THE THIRD REGIONAL AIR NAVIGATIONAL CONFERENCE 
(PARIS 1952) AND SUBSEQUENTLY APPROVED BY THE ICAO COUNCIL ON 23 JUNE 
1952. 
ACCORDINGLY, GREECE HAS BEEN ASSIGNED RESPONSIBILITY FOR ALL ATM 
SERVICES AND ICAO PURPOSES AS WELL AS FOR SAR WITHIN ATHINAI 
FIR/HELLAS UIR AND IS THE ONLY COMPETENT AUTHORITY THEREIN. 
THEREFORE, THE DEFINITION OF EXERCISE OR SAR AREAS WITH REFERENCE TO 
THE AFOREMENTIONED ATHINAI/ISTANBUL FIR BOUNDARY, AS THIS BOUNDARY IS 
CLEARLY DEPICTED IN THE ICAO AERONAUTICAL CHARTS, IS A JUSTIFIED AND 
RIGHTFUL PRACTICE NOT LEAVING SPACE FOR MISLEADING OR 
MISINTERPRETATIONS. 
ON THE AFOREMENTIONED BASIS THE REF (A) GREEK NOTAM A1851/26 (041036 
EUCYYIN JUN 2026) STATES THAT WITH REFERENCE TO REF (C) TURKISH NOTAM 
A2306/26 (020749 EUCYYIN JUN 2026) A PART OF THE AREA AS DESCRIBED IN 
REF (A) GREEK NOTAM A1851/26 (041036 EUCYYIN JUN 2026) STRICTLY LIES 
WITHIN ATHINAI FIR WHERE THE ONLY COMPETENT AUTHORITY TO PROMULGATE 
NOTAMS ACCORDING TO ICAO RULES AND REGULATIONS IS THE HELLENIC CIVIL 
AVIATION AUTHORITY. 
CONSEQUENTLY, THE REF (B) TURKISH NOTAM A2420/26 (041240 EUCYYIN JUN 
2026) HAS NO GROUND, CANNOT PRODUCE ANY INTERNATIONALLY LEGAL EFFECT 
WITHIN ATHINAI FIR/HELLAS UIR AND IS CONSIDERED NULL AND VOID. 
THE REF (A) VALID AND EFFECTIVE NOTAM WITHIN ATHINAI FIR IS THE REF 
(A) A1851/26 ISSUED BY GREECE.

icao text:

A1865/26 NOTAMN  Q) LGGG/QAFXX/IV/NBO/E /000/999/3705N02445E341  A) LGGG B) 2606060500 C) 2606101400 E) NAVIGATIONAL WARNING TO ALL CONCERNED:  REF (A) GREEK NOTAM A1851/26 (041036 EUCYYIN JUN 2026).  REF (B) TURKISH NOTAM A2420/26 (041240 EUCYYIN JUN 2026).  REF (C) TURKISH NOTAM A2306/26 (020749 EUCYYIN JUN 2026).  REFERENCE IS MADE TO THE ABOVE REF (B) TURKISH NOTAM A2420/26 (041240  EUCYYIN JUN 2026) IN ORDER TO STATE THAT THE ATHINAI/ISTANBUL FIR  BOUNDARY BETWEEN POINTS 405000N0261000E AND 365000N030000E HAS BEEN  ESTABLISHED BY ICAO REGIONAL AGREEMENTS WITH THE PARTICIPATION AND  APPROVAL OF TURKIYE AND CONSEQUENTLY IS FOUNDED ON THE FIRMEST  POSSIBLE LEGAL BASIS AS NOTED IN OUR A1709/07 LGGGYNYX NOTAM.  MORE SPECIFICALLY, THE REGIONAL AIR NAVIGATION AGREEMENT REACHED IN  THE SECOND MIDDLE EAST REGIONAL AIR NAVIGATION MEETING (ISTANBUL  1950) AGREED THAT THE ATHINAI/ISTANBUL FIR BOUNDARY BETWEEN POINTS  405000N0261000E AND 365000N030000E FOLLOWS THE WESTERN FRONTIER OF  TURKIYE. THIS AGREEMENT WAS SUBSEQUENTLY APPROVED BY THE ICAO COUNCIL  ON 14 DEC 1950 (DOC 7055 MID/2 RAC) AND IN FEB 1958 (DOC 7879,  EUR/1).  FURTHERMORE, THE SAID ATHINAI/ISTANBUL FIR BOUNDARY WAS DEPICTED ON  CHART NUMBER 7 ATTACHED TO THE REGIONAL AIR NAVIGATION AGREEMENT  WHICH WAS REACHED IN THE THIRD REGIONAL AIR NAVIGATIONAL CONFERENCE  (PARIS 1952) AND SUBSEQUENTLY APPROVED BY THE ICAO COUNCIL ON 23 JUNE  1952.  ACCORDINGLY, GREECE HAS BEEN ASSIGNED RESPONSIBILITY FOR ALL ATM  SERVICES AND ICAO PURPOSES AS WELL AS FOR SAR WITHIN ATHINAI  FIR/HELLAS UIR AND IS THE ONLY COMPETENT AUTHORITY THEREIN.  THEREFORE, THE DEFINITION OF EXERCISE OR SAR AREAS WITH REFERENCE TO  THE AFOREMENTIONED ATHINAI/ISTANBUL FIR BOUNDARY, AS THIS BOUNDARY IS  CLEARLY DEPICTED IN THE ICAO AERONAUTICAL CHARTS, IS A JUSTIFIED AND  RIGHTFUL PRACTICE NOT LEAVING SPACE FOR MISLEADING OR  MISINTERPRETATIONS.  ON THE AFOREMENTIONED BASIS THE REF (A) GREEK NOTAM A1851/26 (041036  EUCYYIN JUN 2026) STATES THAT WITH REFERENCE TO REF (C) TURKISH NOTAM  A2306/26 (020749 EUCYYIN JUN 2026) A PART OF THE AREA AS DESCRIBED IN  REF (A) GREEK NOTAM A1851/26 (041036 EUCYYIN JUN 2026) STRICTLY LIES  WITHIN ATHINAI FIR WHERE THE ONLY COMPETENT AUTHORITY TO PROMULGATE  NOTAMS ACCORDING TO ICAO RULES AND REGULATIONS IS THE HELLENIC CIVIL  AVIATION AUTHORITY.  CONSEQUENTLY, THE REF (B) TURKISH NOTAM A2420/26 (041240 EUCYYIN JUN  2026) HAS NO GROUND, CANNOT PRODUCE ANY INTERNATIONALLY LEGAL EFFECT  WITHIN ATHINAI FIR/HELLAS UIR AND IS CONSIDERED NULL AND VOID.  THE REF (A) VALID AND EFFECTIVE NOTAM WITHIN ATHINAI FIR IS THE REF  (A) A1851/26 ISSUED BY GREECE.

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